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Torque Specs on Intake Manifold?

Old 11-27-2007, 10:20 PM
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350Z400rwhp
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Default Torque Specs on Intake Manifold?

I need to order a shop manual for my car but in the mean time does anyone know the torque specs on the intake manifold. I am installing a Crawford Upper Manifold on Thursday. Does anyone know where I can get a shop manual? Are there different types or is the dealership a good place to look? I know sometimes dealers don't sell them but everyone says that's the first thing one should buy before doing any major projects. Thanks for any help and yes I did search for these specs before asking, I promise! Thanks!
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Old 11-28-2007, 12:38 AM
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I think it's different for every company. My MD + Spacer torque for upper plenum was 100 ft/lbs.
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Old 11-28-2007, 03:34 AM
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100 ft-lbs?? NFW. Lug nuts only get 75 ft-lbs. That would strip the bolts rights out of the soft aluminum plenum. It's more like 110-120 in-lbs.

You can get the correct FSM for your model year from the Nissan website:
http://www.nissan-techinfo.com/nissan/

Sign up for a one day access ($20) then download the manual(s), they are in PDF format.

[Edit: Oops, wrong pic. Here's the correct one that shows all the plenum bolts. Torque is 9-10 ft-lbs or 108-120 in-lbs.]
Attached Thumbnails Torque Specs on Intake Manifold?-snap.jpg  

Last edited by DavesZ#3; 11-28-2007 at 05:21 PM.
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Old 11-28-2007, 08:10 AM
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It's 100 inch lbs for the parameter bolts & 60 inch lbs for the 6 inner bolts..

Follow the tightening sequence listed above.
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Old 11-28-2007, 08:14 AM
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Basically about as tight as you can get it with one hand at the top of the socket wrench (no lever arm torque)... I doubt it will leak - if it does you can try to tighten it further, but hand tight I found works just fine and for me equates to about 60-70 in-lbs of torque
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Old 11-28-2007, 08:18 AM
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Originally Posted by rcdash
Basically about as tight as you can get it with one hand at the top of the socket wrench (no lever arm torque)... I doubt it will leak - if it does you can try to tighten it further, but hand tight I found works just fine and for me equates to about 60-70 in-lbs of torque
This sounds about right. When I installed my polished plenum, I used about 75 inch lbs on all bolts and never had problems. When I installed the 5/16 spacer it was a different story. The specs had to be on the money. 1st time around I had a vaccum leak and had to go back and redo everything.
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Old 11-28-2007, 08:20 AM
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Originally Posted by bugsbbunny
My MD + Spacer torque for upper plenum was 100 ft/lbs.
WOW!
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Old 11-28-2007, 08:23 AM
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Originally Posted by rcdash
Basically about as tight as you can get it with one hand at the top of the socket wrench (no lever arm torque)...

I think it is called a “nut driver.”
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Old 11-28-2007, 02:12 PM
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Thanks A lot everyone. I appreciate the link for the shop manual Dave! I'm installing a Crawford 1st gen. manifold tomorrow night. I hope to feel some gains! Thanks Again!
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Old 11-28-2007, 03:25 PM
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Originally Posted by DavesZ#3
100 ft-lbs?? NFW. Lug nuts only get 75 ft-lbs. That would strip the bolts rights out of the soft aluminum plenum. It's more like 50 in-lbs.

You can get the correct FSM for your model year from the Nissan website:
http://www.nissan-techinfo.com/nissan/

Sign up for a one day access ($20) then download the manual(s), they are in PDF format.
Thank you i just hope you warned him in time.
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Old 05-01-2018, 04:09 PM
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Thanks so much I was stuck today after installing my powder coat intake manifold , the vehicle was running rough followed the sequence all good now respect
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